/Engine/Source/Runtime/CoreUObject/Public/UObject/LinkerSave.h
Returns the appropriate package index for the source object, or default value if not found in ObjectIndicesMap
[FPackageIndex](API\Runtime\CoreUObject\UObject\FPackageIndex) MapObject ( [TObjectPtr](API\Runtime\Core\Delegates\TObjectPtr)< const [UObject](API\Runtime\CoreUObject\UObject\UObject) > Object ) const